Trator of benjamin hewitt



(No Model.)

R. WOOTTON & B. HEWITT.

F. L. MIDDLETON, Ancillary Administrator of B. HEWITT, Deceased. MACHINE FOR MANUPAGTURING SEAMLESS STEEL TUBES.

No. 585,809. Patented July 6, 1897.

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Tara s N RTE ii ROBERT IVOOTTON, OF BIRMINGHAM, ENGLAND, AND FRANK L. MIDDLE- TON, OF WASHINGTON, DISTRICT OF COLUMBIA, ANCILLARY ADMINIS- TRATOR OF BENJAMIN HEIVITT, DECEASED, ASSIGNORS TO THE BRITISH TUBE COMPANY, LIMITED.

MACHINE FOR MANUFACTURING SEAMLESS STEEL TUBES.

SPECIFICATION forming part Of Letters Patent N0. 585,809, dated July 6, 1897. Application filed March 5, 1896. Serial No. 582,000.v (No model.) Patented in England March 14, 1895, No. 5,389.

To all whom it may concern:

Be it known that ROBERT WOOTTON, a subject of the Queen of Great Britain, residing at Birmingham, England, did invent jointly with BENJAMIN HEWITT, deceased, (FRANK L. MIDDLETON administrator,) an Improved Machine for Making Seamless Steel Tubes, of which the following is a specification, the illve'ntion having been patented in England,

No. 5,389, dated March 1%, 1895.

The invention has for its object improvements in machinery for the manufacture of seamless steel tubes,and refers to th e releasing of such tubes from the mandrel upon which they have been drawn, by which they are released more rapidly and easily than heretofore, to effect which the tubes containing the mandrels are passed through a series of rolls, one pair of which is so shaped and operated as to have a twisting action on the tube,-so as to throw up the metal of the tube from the mandrel, thereby enlarging the tube and makin gthe removal of the mandrel an easy matter.

In order that the invention may be clearly 2 5 understood and more easily carried into practice, two sheets of drawings are hereto appended, upon which is fully illustrated the nature of the said improvements, together with the mode of and means for carrying the 0 same into effect.

Figure l is a longitudinal section through one of the machines. Fig. 2 is a plan of same. Fig. 3 is a side elevation with the gearing removed and indicated by dotted lines. Fig. 4: is enlarged elevation of the central rolls. Fig. 5 is a similar elevation to Fig. 4, but showing a modification in the shape of the rolls. Fig. 6 is a cross-sectional elevation showing the means for adjusting the position of the bottom central roll.

In carrying the invention into effect the two pairs of feeding-rolls A and A are mounted in the frame C and are provided with the grooves a for the passing of the tube X, containing the mandrel which may be fed in at or drawn from either end, as the case may be. Intermediately between the two pairs of rolls A and A a third pair of rolls B is mounted, these being shaped as shown at Fig. 4, by

which each roll bites the tube at the two parts b and 5 which are of different diameters. These points when in contact with the tube cause the tube to have a twisted movement as it is fed forward, thereby tending to bulge up the metal of the tube X between the cen- 5 tral rolls B and outer rolls A and A, and thus move its position upon the bar so as to release it. The shafts of the bottom rolls A and A and B are provided with the tooth-wheels P and are connected by the intermediate wheels E, so that the whole of the bottom rolls revolve with a uniform speed and direction, the top rolls being in each case geared with their respective bottom rolls. l

The whole of the top rolls are made vibratory by the springs F, and for the purpose of obtaining a fine lateral adjustment of the central rolls B their shafts are mounted between the screw-pivots H, which are in turn mounted in the sliding blocks J and J in such a manner that the blocks J of the top rolls vibrate with the main shaft against the resistance of the spring f, which, in addition to the springs of the main hearing, are provided for this purpose. The vertical adj ustment of the lower roll B is effected by the wedge K, which is provided with a series of inclined faces 7t, so that the blocks J, bear ing the pivot-pins H of the lower rolls, and the supporting bearing-block N are all equally adjusted by the wedge K and nuts 70 and 70 as will be seen in Fig. 6, by which means the rolls B may be adjusted in or out of line with the rolls A and A, as may be required.

The machine may be driven from either of the shafts, as may be found convenient, and by the addition of the reversinggear the tubes may be passed in at one end and back through the reverse end.

The invention is not confined to the exact 0 the other horizontally, so that the nips of the one pair is on the sides of the tube, While the second pair is top and bottom. There may also be two pairs of rolls B, and one pair of these may be mounted vertically and the other horizontally.

The bevel-rolls B may be so adjusted laterally with regard to each other that the grooves form an oval or elliptical aperture, by the sides of which the tube is operated, thereby giving it the necessary twisting action, as before described.

What is claimed, then, is

In combination, the upper and lower rollers, the shaft for the lower rollers, the bearings therefor, the adjusting'sc-rews II extending axially from the shaft, the blocks J carrying the adjustin g-serews and means for adjusting the bearings and blocks vertically to move the lower roller toward or from the upper roller, said means comprising the wedge with means for moving the same, substantially as described. 7

In witness whereof we have hereunto set our hands in the presence of two witnesses.

ROBT. WOOTTON. FRANK L. MIDDLETON, Ancillary administrator of the estate of Benjamirt Hewitt.

WVitnesses as to the signature of Robert Wootton:

'1Hos. MEADoWoRoFT, ALBERT E. OOKFORD.

Witnesses as to the signature of Frank L. Middleton J AMES M. SPEAK, O. S. MIDDLETON. 

